Thanks for playing. What's your setup? Seems like it's getting weird analog stick inputs from a gamepad or maybe some other device. I will be pushing a fix for that just in case.
I can't really see the geometry problem, I only know the shells are completely fucked up but walls are new to me. It sounds like a chunking problem on specific aspect ratios. Screenshot would help a lot.
In general jumping only gets you off the ground initially and lets you chain different moves from there.